4 References

5 Arguments

1:
order – Nag_OrderTypeInput

On entry: the order argument specifies the two-dimensional storage scheme being used, i.e., row-major ordering or column-major ordering. C language defined storage is specified by order=Nag_RowMajor. See Section 3.2.1.3 in the Essential Introduction for a more detailed explanation of the use of this argument.

This is stored as a notional two-dimensional array with row elements or column elements stored contiguously. The storage of elements Aij, for row i=1,…,m and column j=max1,i-kl,…,minn,i+ku, depends on the order argument as follows:

if order=Nag_ColMajor, Aij is stored as ab[j-1×pdab+ku+i-j];

if order=Nag_RowMajor, Aij is stored as ab[i-1×pdab+kl+j-i].

9:
pdab – IntegerInput

On entry: the stride separating row or column elements (depending on the value of order) of the matrix A in the array
ab.